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On 19 Feb 2006 at 21:40, Constantino Tobio wrote: > Jim Adney wrote: > >Give it a week. In that time the o-ring in that injector may swell up > >enough to stop the leak. Just go out twice a day and turn the key > >enough to keep the fuel lines filled with gas. > Interesting. I figured once the o-ring was done, it was done. I'll keep > giving this a try for a few more days. One of the things that makes an O-ring work is that it will absorb a small amount of the working fluid and swell up a bit. When working with a strong solvent like gasoline, over time, solvent action will actually leach out some of the plasticizers in the O-ring material, so that if the O-ring is allowed to dry again, it will actually be smaller than when it was new. Letting it sit in the fluid again will cause it to swell again and this will often be enough to get it to seal. If rust has already formed on the sealing surface in the meantime, this probably won't work, but my experiences with this have almost always turned out well. > One thing- the fuel line is now dow to <5 psi. Is this the pressure > relief valve giving up here? No valve is perfect, so some leakage is always going to happen. There's no way to tell here whether the leakage you're seeing is thru the pressure relieve valve in the pump or elsewhere, but all our pressure relief valves are 30-35 years old and the rubber tip on that piston isn't going to live forever. I need to go thru my stash of pumps and rebuild several of them, just to see if the fix I have works on all of them, and to build up a backlog of known good reusable pumps. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ List info at http://www.vwtype3.org/list | mailto:gregm@vwtype3.org ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~